<template>
  <web-scrollbar ref="scrollbarRef" height="400px" always @scroll="scroll">
    <div ref="innerRef">
      <p v-for="item in 20" :key="item" class="scrollbar-demo-item">
        {{ item }}
      </p>
    </div>
  </web-scrollbar>

  <web-slider
    v-model="value"
    :max="max"
    :format-tooltip="formatTooltip"
    @input="inputSlider"
  />
</template>

<script lang="ts" setup>
import { onMounted, ref } from "vue";
import { ElScrollbar } from "element-plus";

const max = ref(0);
const value = ref(0);
const innerRef = ref<HTMLDivElement>();
const scrollbarRef = ref<InstanceType<typeof ElScrollbar>>();

onMounted(() => {
  max.value = innerRef.value!.clientHeight - 380;
});

const inputSlider = (value: number) => {
  scrollbarRef.value!.setScrollTop(value);
};
const scroll = ({ scrollTop }) => {
  value.value = scrollTop;
};
const formatTooltip = (value: number) => {
  return `${value} px`;
};
</script>

<style scoped>
.scrollbar-demo-item {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 50px;
  margin: 10px;
  text-align: center;
  border-radius: 4px;
  background: var(--web-color-primary-light-9);
  color: var(--web-color-primary);
}
.web-slider {
  margin-top: 20px;
}
</style>
